原文Florian's ability checks only how much life opponents lost during the turn, not by how much their life totals decreased compared to the start of the turn. For example, if an opponent lost 2 life and then gained 8 life before Florian's ability resolves, you'll look at the top two cards of your library.
原文If you somehow have more than two main phases in a turn, each main phase after your first one is a postcombat main phase, and Florian's last ability triggers at the beginning of each of them.